Allow PDF exports to include dynamic content

Summary

By default, when exporting pages to PDF, if there is an iFrame macro within it, the part where the macro is supposed to appear will be empty.

Steps to Reproduce

1. Create a page and insert the iFrame macro.
2. Once the page is published, tap the ellipsis button at the top-right > Export > Export to PDF
3. Download the exported file.

Expected Results

The content within the iFrame should be displayed.

Actual Results

No content is displayed where the iFrame is located.

Workaround

Convert the affected page to the new editor in order to workaround the issue.
We are also currently working to improve the PDF experience, making this function available.